This circuit was found in Radio Electronics from the 90s. It converts capacitance into frequency in order to obtain a proportional voltage that can be measured in a common multimeter.
This circuit detects power cables energized by the field they produce. The captured signals can be...
The difference in the circuit shown in the figure, in relation to the CIR8144r, is that it uses a...
This circuit for light modulated in frequency (FM) operating at 50 kHz was found in a 90’s...